Shuttle



June 7, 1932. A, CHRISTQPH.

SHUTTLE Filed April '7, 1930 such case .t

Patented June 7, i932 UNITED STA Tas lPirnsm'r OFFICE .ALFRED CHRISTOPH, `OIE LEUTERSDORF, GERMANY SHUTTLE application med april 7, i930, sei-m No.

produced.

The wooden-shuttles nowada s in use are soon worn down bein expose in view of the high wear and roug handling, to tearing and splintering o f the wood apart from the disadvantages involved in the swelling, shrinking and warping of the wood. They become unfit for use as soon as the wood splinters or becomeskcroughened at the edges of the cavit receivin the bobbin, because 1n be weft t read is liable to jam or to be braked'in-its course. l

It has therefore been suggested to coat the wooden shuttle with a protective skin, for. instance with a leather skin. Ithas however been found that a leather skin is unduly deendent from the` iniuences of moistureandy swelling in moist air enlarges. the cross" sect-ion ofthe shuttle tothe extent that it is liable to jam in the shuttle box. x,Leather further hasa tendency to scale off and for this and the other reasons mentioned above wooden shuttles coatedk with a leather/skin have come out of use altogether.` f

Vulcan fibre has further been suggested as a covering forthe wooden shuttle, however this material lacks sufficientI mechanical strength and cannot be united with the shuttle body in a suiiiciently intimate manner. A fibre skin will become'rough at all places exosed to friction and will therefore exert a raking effect on the shuttle. Celluloid skins have proved altogether unsuitable in view of the high mechanical stress placed thereon and further in view of the ready infiamma bility of the material. v

Ithas further been suggested to solve this problem by impregnating the wooden shuttle body with an artificial resin. It has how-v ever been found that the splintering of the wood cannot be avoided by such impregnation. Therefore shuttles have been recommended consisting of a number of superposed and firmly united layers of a fabric impreg- -against all variations of shape 442,293, and in Germany April 18, 1989.

nated with artificial resins. It has however been found that the weight of such shuttles is prohibitive, the mass inertia of such a shuttle being too high.

According to the present invention now a Wooden shuttle body is formed with a coatin or skin consisting of a fabric impregnate with artificial resin. A shuttle according to this invention fullycorresponds to all requirements of the modern art of weaving not only as regards comparatively' low weight and mechanical strength, but also resistivity and cross lection and against the action of moisture and eat.`

If a skin of fabric impregnated with artig fcial resin is mounted under high pressure v on the Wooden shuttle body it will be rmly united therewith and in practical use the surface of the skin will gradually become smoother.

In view of the high mechanical resistivity of this skin the shuttle body may be made of wood having a particularly low specific weight.

Obviously instead of an impregnated fabric also layers of textile fibres, similarly impregnated with artificial resin, may be used.

Obviously the impregnated skin after having been mounted in place on the wooden shuttle body must be subjected to the combined action of heat and pressure in order to convert the soluble resin into a hard and insoluble final product, in a manner well known to those skilled in the art In the drawing aiiixed to the specification and forming part thereof, a shuttle embodying this invention is illustrated diagrammatically by way of example.

In the drawing Fig. 1 is a longitudinalsection, while Fig. 2 is a cross section on the line II-II in Fi l.

Referring to the drawing, a is the wooden shuttle body and?) is a strip of fabric impregnated With an artificial resin, this strip being tightly wound around the shuttle body and being then exposed to the combined action of heat and pressure in the usual Inanner. If desired, the outer configuration of 2 'f' .p i 1,861,593

this compound shuttle body can be modified subsequently by mechanical means, for instance by milling, grinding and the like, by turning the ends of the body etc. In this 5 body, which is solid at first, the cavity c and the bottom slot d are now formed byvmilling. As shown in Fig. 2, the Wood a isfremoved almost totallyv in the "middle part of thev shuttle and, if desired, the Wood may even beY removed here altogether. v

The ends of the shuttle may be reinforced by steel caps c as usual, or the tips of the shuttle body may be cut oii and solid conical steel points may be mountedthereon ina Well known manner.

course,fif desired, the' Wooden core Yof, the, :shuttle body may also be excavated by milling before the skin is mounted thereon. While in the modification shown' inthe 2d-""dravving thegskin b is supposed to consist offlas'tripj of impregnated fabric wound aroundth Wooden core, such a skin may eduallyivvell be formed of a feitflile mass ,Ofbres Similarly impregnated with a soluble "artifieial resin, such layer being thereafterl subjected to the combined action of heat and high pressure, to compress and 'smooth it and to simultaneously convert the soluble resin into the hard insoluble final product. Instead of a fabric or a telt-like web of fibrespaper impregnated with an artificial resin may be used to protect the Wooden body. vThe term artificial resins include all products known in the trade as being formed under the combined action of heat andpresw sure from plastic and partly also soluble in" termediate roducts, such as for instance the products o condensation of a phenol With an aldehyde. 4oVv I Wish it to be understood that I do Inot desire to be limited to the exact details of construction shown and described for obvious modifications Will-.occur to a `person skilled in the art.- In the claims atliXed-to this specification no selection of any particular modification ofthe invention is intended to the exclusion of other modifications thereof and the right to subsequently make claim to any modifica'- 'tion not covered by these claims is expressly reserved.

I'claimt- 1 The method of producing shuttles comprising securing one solid Wooden blank a skin consisting of fibrous material impreghated' with a soluble artificial resin, subjecting the Whole to the combined action of heat and pressure to render the resin insoluble and removing part of the wood by mechanical action. Y l In testimony yvvliereor' I aix my si nature. I ALFRED CHRIST PH. 

